// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/trace_event/java_heap_dump_provider_android.h"

#include "base/android/java_runtime.h"
#include "base/trace_event/process_memory_dump.h"

namespace base {
namespace trace_event {

    // static
    JavaHeapDumpProvider* JavaHeapDumpProvider::GetInstance()
    {
        return Singleton<JavaHeapDumpProvider,
            LeakySingletonTraits<JavaHeapDumpProvider>>::get();
    }

    JavaHeapDumpProvider::JavaHeapDumpProvider()
    {
    }

    JavaHeapDumpProvider::~JavaHeapDumpProvider()
    {
    }

    // Called at trace dump point time. Creates a snapshot with the memory counters
    // for the current process.
    bool JavaHeapDumpProvider::OnMemoryDump(const MemoryDumpArgs& args,
        ProcessMemoryDump* pmd)
    {
        // These numbers come from java.lang.Runtime stats.
        long total_heap_size = 0;
        long free_heap_size = 0;
        android::JavaRuntime::GetMemoryUsage(&total_heap_size, &free_heap_size);

        MemoryAllocatorDump* outer_dump = pmd->CreateAllocatorDump("java_heap");
        outer_dump->AddScalar(MemoryAllocatorDump::kNameSize,
            MemoryAllocatorDump::kUnitsBytes, total_heap_size);

        MemoryAllocatorDump* inner_dump = pmd->CreateAllocatorDump("java_heap/allocated_objects");
        inner_dump->AddScalar(MemoryAllocatorDump::kNameSize,
            MemoryAllocatorDump::kUnitsBytes,
            total_heap_size - free_heap_size);
        return true;
    }

} // namespace trace_event
} // namespace base
